/*******************************************************************************
 * Copyright (c) 2005, 2015 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    John Camelon (IBM Rational Software) - Initial API and implementation
 *    Yuan Zhang / Beth Tibbitts (IBM Research)
 *    Markus Schorn (Wind River Systems)
 *******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.c;

import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTCompletionContext;
import org.eclipse.cdt.core.dom.ast.IASTDeclaration;
import org.eclipse.cdt.core.dom.ast.IASTDeclarator;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTSimpleDeclaration;
import org.eclipse.cdt.core.dom.ast.IBinding;
import org.eclipse.cdt.core.dom.ast.ICompositeType;
import org.eclipse.cdt.core.dom.ast.IEnumeration;
import org.eclipse.cdt.core.dom.ast.ITypedef;
import org.eclipse.cdt.core.dom.ast.c.ICASTElaboratedTypeSpecifier;

/**
 * Node for elaborated type specifiers (examples: struct S; union U; enum E;)
 */
public class CASTElaboratedTypeSpecifier extends CASTBaseDeclSpecifier implements
        ICASTElaboratedTypeSpecifier, IASTCompletionContext {

    private int kind;
    private IASTName name;


    public CASTElaboratedTypeSpecifier() {
	}

	public CASTElaboratedTypeSpecifier(int kind, IASTName name) {
		this.kind = kind;
		setName(name);
	}

	@Override
	public CASTElaboratedTypeSpecifier copy() {
		return copy(CopyStyle.withoutLocations);
	}

	@Override
	public CASTElaboratedTypeSpecifier copy(CopyStyle style) {
		CASTElaboratedTypeSpecifier copy = new CASTElaboratedTypeSpecifier(kind,
				name == null ? null : name.copy(style));
		return copy(copy, style);
	}

	@Override
	public int getKind() {
        return kind;
    }

    @Override
	public void setKind(int value) {
        assertNotFrozen();
        this.kind = value;
    }

    @Override
	public IASTName getName() {
        return name;
    }

    @Override
	public void setName(IASTName name) {
        assertNotFrozen();
        this.name = name;
        if (name != null) {
			name.setParent(this);
			name.setPropertyInParent(TYPE_NAME);
		}
    }

    @Override
	public boolean accept(ASTVisitor action) {
        if (action.shouldVisitDeclSpecifiers) {
		    switch (action.visit(this)) {
	            case ASTVisitor.PROCESS_ABORT : return false;
	            case ASTVisitor.PROCESS_SKIP  : return true;
	            default : break;
	        }
		}
        if (!visitAlignmentSpecifiers(action)) {
        	return false;
        }
        if (name != null) if (!name.accept(action)) return false;
        if (action.shouldVisitDeclSpecifiers) {
		    switch (action.leave(this)) {
	            case ASTVisitor.PROCESS_ABORT : return false;
	            case ASTVisitor.PROCESS_SKIP  : return true;
	            default : break;
	        }
		}
        return true;
    }

	@Override
	public int getRoleForName(IASTName n) {
		if (n != name) return r_unclear;

		IASTNode parent = getParent();
		if (!(parent instanceof IASTDeclaration))
			return r_reference;

		if (parent instanceof IASTSimpleDeclaration) {
			IASTDeclarator [] dtors = ((IASTSimpleDeclaration) parent).getDeclarators();
			if (dtors.length == 0)
				return r_declaration;
		}

		//can't tell, resolve the binding
		IBinding binding = name.resolveBinding();
		if (binding instanceof ICInternalBinding) {
			IASTNode node = ((ICInternalBinding) binding).getPhysicalNode();
			if (node == name)
				return r_declaration;
		}
		return r_reference;
	}

	@Override
	public IBinding[] findBindings(IASTName n, boolean isPrefix) {
		IBinding[] result= CVisitor.findBindingsForContentAssist(n, isPrefix);
		int nextPos= 0;
		for (int i = 0; i < result.length; i++) {
			IBinding b= result[i];
			if (b instanceof ICompositeType) {
				ICompositeType ct= (ICompositeType) b;
				switch (ct.getKey()) {
				case ICompositeType.k_struct:
					if (getKind() != k_struct)
						b= null;
					break;
				case ICompositeType.k_union:
					if (getKind() != k_union)
						b= null;
					break;
				}
			} else if (b instanceof IEnumeration) {
				if (getKind() != k_enum)
					b= null;
			} else if (b instanceof ITypedef) {
				b= null;
			}
			if (b != null) {
				result[nextPos++]= b;
			}
		}
		if (nextPos != result.length) {
			IBinding[] copy = new IBinding[nextPos];
			System.arraycopy(result, 0, copy, 0, nextPos);
			return copy;
		}
		return result;
	}
}
